Research On The Suppression Of The Gyroscopic Effect Of Flywheel

Flywheel energy storage system as a new energy storage way,have broad applications in many areas because of its advantages such as high energy storage density,pollution-free,long life-time and so on.The stability control of flywheel under high speed becomes a hot research.However,the flywheel rotor will produce a strong gyroscopic effect at high speed,which has a serious impact on the flywheel rotor.So research on the suppression of strong gyroscopic effect of flywheel has great significance.Aiming at the problem of strong gyroscopic effect under high-speed rotation of the flywheel,the current control method such as dispersion PD control and cross-feedback control are analyzed.According to the inconsistent problem of detected displacements caused by the ectopic installation of damper and magnetic bearing,a new magnetic bearing with appositional damper is proposed to optimize the effect of suppressing vibration and gyroscopic stabilization issues.First,the basic principle of magnetic bearings from flywheel is introduced,and single-DOF and four-DOF dynamic models of magnetic bearings are analyzed.The generation principle of gyroscopic effect and the impact of gyroscopic torque on rotor are analyzed.Based on the principles of dispersion PD control and cross-feedback control principles,the control models and equations are established.Then,based on the electromagnetic damping principle considering of the magnetic vector potential,a new magnetic bearing with appositional damper is proposed.The electromagnetic damper force model is build according to the basic electromagnetic theory,with this model the characteristics of the damper is simulated and we obtained the distribution of damper force and its relationship with the current.The control model based on the new magnetic bearing with appositional damper is build,including the dispersion PD control,cross-feedback control.The calculation methods of parameters from control system are proposed.Finally,the simulation models with dispersion PD control,cross-feedback control and appositional electromagnetic damper are built in the MATLAB/Simulink.After determination of system and control parameters under the satisfaction of Routh criterion,the vibration suppression capability of damper is verified in magnetic bearing model of single-DOF.By analyzed the movement of the rotor in these three cases,the simulation results show that the strong gyroscopic effect of magnetic flywheel system can be suppressed by the cross feedback control and the electromagnetic damper.